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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old January 10th, 2013, 14:35   #1
Uimytdi
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Default Frequent regens

It's been happening more than normal. I have been driving the same route since I got the car and it almost never would be in the middle of a regen when I turned it off.(fan staying on) but over the past few tanks I've noticed it happening almost every time I stop. It's happened 3 times this tank of gas and I still have about a 1/4 left.

Any idea what's happening? Is my dpf just becoming clogged? I try to redline it often enough to heat everything up in an attempt to prevent this.

Car has 80k miles on it.
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Old January 21st, 2013, 19:37   #2
OldMan52
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just a thought...when it's cold, car takes longer to warm up, and more soot is produced.
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Old January 22nd, 2013, 08:27   #3
FowVay
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I thought my car was doing very frequent regenerative burns but after watching the tachometer every time I realized that the fans were running but I wasn't getting any RPM increase. I figured that it was just my cooling fans running to cool the engine.
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Old January 22nd, 2013, 08:30   #4
VeeDubTDI
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You really need a ScanGauge or UltraGauge or whatever to VERIFY what is really happening.

If you keep interrupting the regens, it will keep trying to do it until it completes one. Stop interrupting them.
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Old January 22nd, 2013, 08:57   #5
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Mine seems that do one every 250km.
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Old January 24th, 2013, 12:36   #6
socrates42
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I think mine is doing it too. What is the code for Regen? I have a bluetooth OBDII Tool that I can use.
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Old January 24th, 2013, 12:39   #7
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Your what is doing it, too? The 2006 listed in your profile does not do regens.
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Old January 24th, 2013, 12:50   #8
RebelTDI
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Regens should occur every 400-600 miles. I imagine driving conditions will affect this. As stated above, if you interrupt a regen, another will occur until it is complete. BTW, I don't think that you can conclude that every time the fan runs after turning the car off that it was in the middle of a regen, according to the service manager I deal with. If anyone knows differently, let us know.
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Old January 24th, 2013, 13:13   #9
cd_booth
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There have been occasions where I didn't notice a higher than usual idle and the fans running after shut down. This would indicate that it wasn't in the middle of a regen.
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Old January 27th, 2013, 16:12   #10
bombero
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Why does the Passat use the fluid for this when it is the same engine? Not sure which system I would rather have though...
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Old January 27th, 2013, 16:37   #11
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The AdBlue exhaust fluid isn't used for regens, per se - it is injected all the time to control NOx emissions. By having the exhaust fluid, the emissions system is significantly less complicated and allows for better fuel efficiency. This is why the Passat, despite its larger size, is capable of getting better fuel economy than Golfs and Jettas.

http://en.wikipedia.org/wiki/Diesel_exhaust_fluid
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